Databinding and Validation with UserControls

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- Previous
  - 1
    - Thanks sir, let me try it . -- FireCrow Studio Kylin Garden EMail:w0wd@sohu.com ICQ:156134382 Tag: Databinding and Validation with UserControls Tag: 86151
  - 2
    - Custom Control Sizes in constructor *and* parent form If I create a custom control that's 200x200, then drag it into my main form, the designer adds code to set the size. This means if I open the control, and change its dimensions, I have to also remove the ".Size = x" line in InitializeComponent of the parent form! Is there any way to stop properties like size, font etc. being duplicated in the form, when they're all already present in the controls constructor? Thanks, -- Danny Tag: Databinding and Validation with UserControls Tag: 86149
  - 3
    - How can share the value between more Windows Forms ? hi, Where the user input there Login Name and Password, and I want to remerber this values In maninform, and this values will be used by other form, eg: Change password Form, this need the user's name ,oldpassword, new password, and the user's name comes from the mainform. how can do for this ? -- FireCrow Studio Kylin Garden EMail:w0wd@sohu.com ICQ:156134382 Tag: Databinding and Validation with UserControls Tag: 86148
  - 4
    - Taskbar Group Icon still shows empty I am running XP SP2 I have a VB.NET appliction that has the same icon assigned to the EXE and all the forms. I still get the blank group icon on the taskbar. I have tried my Main form opening another form by executing: theForm.ShowDialog() theForm.ShowDialog(Me) theForm.Show() What else am I missing? Thanks. Tag: Databinding and Validation with UserControls Tag: 86147
  - 5
    - Bug with Owner Drawn Context Menus and ComboBoxes Have a look at the code below. It's a really simple example where I have added two controls to a form, a textbox and a combo box. Both add owner drawn context menus to the controls, but the combobox will NOT draw custom drawn context menu item. I have tried EVERYTHING (deriving from MenuItem and even tried calling TrackPopupMenuEx directly), but it just won't work! I am currently reflecting over the combobox source code (oh joy!), but if anyone can help me, I will BE SOOOOO VERY GRATEFUL!!!! thanks andrew using System; using System.Drawing; using System.Diagnostics; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace ComboContextBug { /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { private ComboTest comboBox1; private TextBoxTest textBox1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.comboBox1 = new ComboContextBug.ComboTest(); this.textBox1 = new ComboContextBug.TextBoxTest(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.SuspendLayout(); // // comboBox1 // this.comboBox1.Location = new System.Drawing.Point(180, 32); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(121, 21); this.comboBox1.TabIndex = 0; this.comboBox1.Text = "comboBox1"; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(180, 98); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(121, 20); this.textBox1.TabIndex = 1; this.textBox1.Text = "textBox1"; // // label1 // this.label1.Location = new System.Drawing.Point(8, 20); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(168, 52); this.label1.TabIndex = 2; this.label1.Text = "Right click this combo and you will see that the OwnerDrawn item does NOT appear!" + ""; // // label2 // this.label2.Location = new System.Drawing.Point(8, 86); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(168, 52); this.label2.TabIndex = 3; this.label2.Text = "Right click this textbox and you will see that the OwnerDrawn item DOES appear!"; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); this.ClientSize = new System.Drawing.Size(336, 157); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.textBox1); this.Controls.Add(this.comboBox1); this.Name = "Form1"; this.Text = "Combo Context Menu Bug"; this.ResumeLayout(false); } #endregion /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } } public class ComboTest: ComboBox { public ComboTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL NOT appear on a ComboBox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } public class TextBoxTest: TextBox { public TextBoxTest() { base.ContextMenu = new ContextMenu(); MenuItem mnuOwnerDraw = new MenuItem(); mnuOwnerDraw.Text = "This text WILL appear on a Textbox!"; mnuOwnerDraw.OwnerDraw = true; mnuOwnerDraw.DrawItem +=new DrawItemEventHandler(mnuOwnerDraw_DrawItem); mnuOwnerDraw.MeasureItem +=new MeasureItemEventHandler(mnuOwnerDraw_MeasureItem); base.ContextMenu.MenuItems.Add(0, mnuOwnerDraw); MenuItem mnuNormalDraw = new MenuItem(); mnuNormalDraw.Text = "This text WILL appear!"; mnuNormalDraw.OwnerDraw = false; base.ContextMenu.MenuItems.Add(0, mnuNormalDraw); } private void mnuOwnerDraw_DrawItem(object sender, DrawItemEventArgs e) { MenuItem menu = sender as MenuItem; e.Graphics.DrawString( menu.Text, this.Font, SystemBrushes.ControlText, e.Bounds.X + 15, e.Bounds.Y ); } private void mnuOwnerDraw_MeasureItem(object sender, MeasureItemEventArgs e) { MenuItem menu = sender as MenuItem; string text = menu.Text; e.ItemWidth = (int)(e.Graphics.MeasureString(text, this.Font).Width) + 3; e.ItemHeight = (int)(e.Graphics.MeasureString(text, this.Font).Height) + 2; } } } Tag: Databinding and Validation with UserControls Tag: 86146
  - 6
    - fonts anyone know a simple way to make a font property persist for a custom control? cheers dave Tag: Databinding and Validation with UserControls Tag: 86141
  - 7
    - Application icon in VC++ Hello, I am using Visual C++ .NET and developing new windows forms application. What I need is to change the default application icon (the one that is seen in windows explorer) to my icon. I tried: - Look for 'application icon' in project settings - no luck, suppose this option is available only in C# or VB projects. - Changing app.ico to my icon: this works fine, but this changes only 32x32 icon, but in list view in explorer this changes to default 16x16 icon - Using /win32icon:myicon.ico as an option of compiler (set in project settings) - it does not recognize this option as known option. Thanks in advance for assistance. Alex. Tag: Databinding and Validation with UserControls Tag: 86140
  - 8
    - dropdownlist - index of an item Hi, I have in a dropdownlist the following values: "aa", "bb", "cc" I want the item "bb" will be the selected item. I can find it in a collection by: myItem = myControl.Items.FindByText("bb"); To make this item selected I can use: int index = myControl.Items.IndexOf(myItem). is there any more simple way how to do it? Something like index = GetIndex("bb"); i can not find such a method. Thanks, Lubomir Tag: Databinding and Validation with UserControls Tag: 86138
  - 9
    - How can I limit the number of the applicatin' login trying ? I give a login form for my application, and I give 3 times to the app's user, if he input his name and pwd out 3 times, the login form will closed . how can I do it ? Tag: Databinding and Validation with UserControls Tag: 86132
  - 10
    - Datarepeater Hi, NG! Is there any updated version (.Net) of the Datarepeater control or do I have to use the old (VS6.0) version? Thanks. pax Tag: Databinding and Validation with UserControls Tag: 86131
  - 11
    - How to set screen color depth and disable hardware acceleration in .net? Hi, Does anyboy know how to implement following 2 features in .net? 1.Change screen color depth 2.Disable hardware acceleration So far, I know how to change screen resolution in .net, but havent found solutions for above 2 requirements. Looking forward to ur reply. Thank, William Tag: Databinding and Validation with UserControls Tag: 86129
  - 12
    - At what point does the MDI parent become visible? I want to put code that executes only once at the first available point after the MDI parent form is visible so I can give feedback to the user while the application is retrieving configuration data from a database and doing other setup work. The _Load is too early because the form is not yet visible, and _Activated seems not well suited because it fires too frequently. The closest I've come is to use _Activated with a Boolean set after the first call so the setup code doesn't execute, but it still seems ill-suited. Any suggestions would be greatly appreciated. I'm a DBA by trade, so bear with me. Tag: Databinding and Validation with UserControls Tag: 86128
  - 13
    - best contol for capturing steaming and displaying streaming input? I have a Windows forms application that is reading messages off off a queue, and I want to stream them into a window to view. Currently I am using a textbox classes/methods of textbox.Append(...) and textbox.ScrollToCaret()... It seems that there is limit to the number of characters you can write to a textbox... I would appreciate any recommendations on the best contol/technique to used to stream input into a form and to automatically advance the scrollbar as input arrives. I want to capture several thousand lines before I cleanup... thanks Tag: Databinding and Validation with UserControls Tag: 86119
  - 14
    - Creating a 1bpp mask from a byte array Hi First of, I am posting to this newsgroup as it seemed best suited even though I am writing C++ for a standard Windows application. The application uses GDI+ which forms the basis of the System.Drawing namespace...anyway here goes: I am trying to create a 1 bit per pixel mask to use as an overlay. The data for the mask i generated dynamically based on user input and is available as a byte array. I get the first failure when trying to create the mask bitmap, the code is a follows: /** * Utiliy method, creates a mask bitmap and modifes the palette accordingly. * @param size Size of the mask. * @param color Color of the mask. * @param pixels The pixels. */ Bitmap* createMask( const Size& size, const Color& color, Byte* pixels ) { Bitmap* mask = new Bitmap( size.width, size.height, ((size.width+3)>>2)*4/8, PixelFormat1bppIndexed, pixels ); UInt paletteSize = mask->GetPaletteSize(); if( paletteSize > 0 ) { ColorPalette* palette = (ColorPalette*)malloc( paletteSize ); mask->GetPalette( palette, paletteSize ); if( palette->Count == 2 ) { palette->Entries[0] = Gdiplus::Color::Black; palette->Entries[1] = Gdiplus::Color::MakeARGB( color.GetA(), color.GetR(), color.GetG(), color.GetB() ); } mask->SetPalette( palette ); free( palette ); } return mask; } Since that didn't work, I tried letting GDI+ create a mask bitmap of the specified size and the copy the pixels into that bitmap. But when I try to display the image I either get nothing or a GPF. My display code is very simple: // Bitmap *maskBitmap; // Defined elsewhere Graphics g( hDC ); g.DrawImage( maskBitmap, 0, 0 ); So it basically just creates Graphics object and attempts to draw the image. The latter fails however... Teis Johansen Tag: Databinding and Validation with UserControls Tag: 86118
  - 15
    - HELP NEEDED REGARDING MAKING OTHER LANGAUGE (i.e. HINDI)ENABLED WINDOWS APPLICATION IN .NET (Type your message here) -------------------------------- From: kinshuk kukreti hi every one i am new to .net development my problem is that i want to make a windows application which could enable the user to enter data in HINDI language i have seen their is some property of form like LOcalizable ,language,IME Mode and of text box like IME MOde what i am doing is using MAngal font Which is used for Hindi Language for text box and setting its IME Mode property to True at design time i'm also setting IME MODE property of form to true and also setting LOCAlizable to true and LAnguage property to HINDI i have also installed the IME 1.1 it is working fine with the MICROsoft Word and showing a bar which displays Help etc. But in .NET it not showing anything but at run time i'm not getting the desired results does any body here can help me i'm sure i'm wrong some where ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>WAKtCPMagUiZGjwvLxsVrg==</Id> Tag: Databinding and Validation with UserControls Tag: 86116
  - 16
    - making forms larger than screen size (Type your message here) -------------------------------- From: Zaher Zeidan is there a way to resize a form so that it's bigger than the screen size of the windows?? I mean if you run your windows with 780x1024 resolution you won't be able to set your height or width to any thing larger than this.. this is really stupid from the IDE to prevent developers from resizing the form larger than the screen area since this would enable you to get a lot of space in design time and/or using scroll bars to put lot of controls in one window.. Old Visual Studio didn't have this limitation.. anyone knows a workaround for this??? ----------------------- Posted by a user from .NET 247 (http://www.dotnet247.com/) <Id>/ORUU75l20+l5QvA6bsPPg==</Id> Tag: Databinding and Validation with UserControls Tag: 86114
  - 17
    - CheckedListBox::SetItemChecked will not display properly on TabCon Hi all I have this checkedlistbox that appears on a winform that has a tabstrip control. The tabstrip control has say more thatn 2 tabs. On the first tab there is a checkedlistbox. The checkedlistbox first loads all possible items from a database; say 10 options total for a user to select. I then make another call to a database table that has the previously selected options for the checkedlistbox. All the data comes back from the database fine. I am able to use the SetItemChecked method to set which ever items in teh checkedlistbox as checked, but when it finally is rendered on the screen, none of the checked items show as checked. If I move the checkedlistbox to another tab that is not to display at the time of rendering for the form, I can select that tab and the items are checked. I am wondering if any of you have seen anything similar to this. Thanks for any assitance. Tag: Databinding and Validation with UserControls Tag: 86113
  - 18
    - How to change the font in the grid? My textboxes use Tahoma, 9. I want to use the same for my grid. Is is possible? How do I do this? I found this: DataGrid1.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte)) in another forum, but I'm getting "'Point' is not a member of 'System.Drawing.GraphicsUnit'." If I change Point to Pixel, I get "Overload resolution failed because no accessible 'New' accepts this number of arguments." Tag: Databinding and Validation with UserControls Tag: 86106
  - 19
    - How to make the gray area of the grid white? I'm developing an application for Pocket PC in VB .NET. My grid can contain up to 10 rows, but my table has only 2 and I see the dark gray area. Is there a way to change the color of it? 'DataGrid1.BackgroundColor' works for a Windows Application, but not Smart Device Application... Tag: Databinding and Validation with UserControls Tag: 86105
  - 20
    - Validating event not firing for a checkbox Hi, I am generically adding a handler for the Validating event of various controls. When added to a checkbox, the event never fires. Any solution here? Tag: Databinding and Validation with UserControls Tag: 86104
  - 21
    - Data path changes after saving files with SaveFileDialog Using VB.NET I have the path to my Access file stored in an App.config file: <add key="constring" value="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Data/METL.mdb;Persist Security Info=False"/> I usually set the connection like this: '* Get the appSettings constring value (set in the web.config) strConstring = System.Configuration.ConfigurationSettings.AppSettings("constring") '* Connects to database ocnConnection = New OleDb.OleDbConnection(strConstring) After creating an Excel file and saving it to a folder other than the application folder, my database connections always try to find the database file in the folder the Excel file was saved to. If dlgSaveFile.ShowDialog() = DialogResult.OK Then Excel.DisplayAlerts = False Excel.AlertBeforeOverwriting = False Excel.ActiveWorkbook.SaveAs(dlgSaveFile.FileName) Excel.ActiveWorkbook.Close() Else Excel.ActiveWorkbook.Close(False) End If Thanks, Sacha Tag: Databinding and Validation with UserControls Tag: 86103
  - 22
    - Drag a tree view node on to a richedit I want to be able to drag a treeview node, drop it on to a rich edit box and when that event occures, insert some text into the rich edit at the location that the node was dropped. Possible? Any hints on how to do this, as I'm not sure where to start. Tag: Databinding and Validation with UserControls Tag: 86101
  - 23
    - Windows app access db internet Hi, I built a windows form client app that access a db on a network. Now I was wondering how can I set it up so that the app accesses the database through the web? I don't want to rebuild the client app into an asp.net app. Maybe I could or should use Web Services that sits on a web server with database and do my updating through this route. What do you guys/gals think? Thanks, JJ Tag: Databinding and Validation with UserControls Tag: 86099
  - 24
    - WinForm Behavior Hi. I´m developing an MDI aplication and I have a base form from where all child windows inherits. The issue is that all the controls I place in the inherited child form at design time use say Arial 12 font and the textboxes are 20pixels hi, however at runtime everything ends up twice as large than designed, like Arial 16 and textboxes 40pixels hi. So far this is cool because I infact need to adjust the size of the controls all over the aplication according to the resolution it is being running on. However I don't know what feature is that and need to know what it is in order to control it! Any ideas? is it the base form used by the child windows or is something on the MDI container that somehow "inherits" some property to the controls the contain? Thanks in advance, Nando Tag: Databinding and Validation with UserControls Tag: 86095
  - 25
    - Multirow listview (sort of) I have a problem with my windows form. I want to display items that doesn't fit on one row in a listview. I would like to find a control which enables me to add all my columns but one to the first row and the last column on the second row. If it was a html-table an item would look like this <tr><td>Column 1</td> <td>Column 2</td> <td>Column 3</td> </tr> <tr> <td colspan="3">Column 4. Big.</td> </tr> It would be nice if the control would be similar to a listview in Details-view (able to change the width and sort on the columns in the first row). /nisse Tag: Databinding and Validation with UserControls Tag: 86093
- Next
  - 1
    - What happens when WindowState =Minimized ? Hi, i found unusal things happening when Program main window is minimized. I'm writing large programm on C# and having problem whith memory size allocated bu program. Every time i use some dialog's ShowDialog() the memory size of process increases. But ones i minimize main window memory size decreases significantly (for example : program that was just loaded whith 2 nonmodal dialogs takes 35 MB, after Minimize and Restore it becomes 5 MB after restoring comes 8MB). My questions are : Which actions are take when window is minimized ? How can I reproduse these actions in order to decrease used memory size (Without Minimize & Restore)? I tried with GC.Collect() it doesnt help. Please help.. I need it very urgent. Giga Tag: Databinding and Validation with UserControls Tag: 86081
  - 2
    - An Application's forms Is it possible to get a reference to a collection of all an Application's loaded forms? I want to do something like... For each Form in Application.Forms Form.ResetLocation Next Form Tag: Databinding and Validation with UserControls Tag: 86080
  - 3
    - How to import a text file from a WinForms to a db How to import a text file from a WinForms to db some one cam help me? marco Tag: Databinding and Validation with UserControls Tag: 86078
  - 4
    - Skip LinkLabel in TAB order I have designed a custom control derived from UserControl which contains a LinkLabel and a TextBox. If the user uses the TAB key to move the focus to my custom control I want the TextBox to get the focus and not the LinkLabel. Therefore I set the TabStop property of the LinkLabel control to False (in the constructor of my custom control, after InitializeComponent()). However, the TabStop property of the LinkLabel is ignored and it still gets the focus. As a workaround I tried to override OnEnter of my custom control: Protected Overrides Sub OnEnter(ByVal e As System.EventArgs) myTextBox.Focus() End Sub Unfortunately this doesn't work either. The TextBox gets the focus but immediately afterwards the focus moves to the LinkLabel. Overriding OnGotfocus results in the same behaviour. How could I prevent the LinkLabel to get the focus if the user uses the TAB key to move the focus to my custom control? Thanks for any ideas, Guido Tag: Databinding and Validation with UserControls Tag: 86077
  - 5
    - How to achieve the following functionality with Windows Forms ? I have a useful framework, written in a different language (PowerBuilder), which I'd like to replicate in .Net and Forms, but I'm unsure of how to approach it, as the Event model is being used different between the development environments. Currently we have data entry screens, whose columns have been "wired" into a class that performs checks on the entered data. As the user "leaves" a column, the specific check / business rule is carried out. A lot of the checks are common across all the screens and linking the column to the specific method to be called is as easy a giving the column the appropriate Name. How can I create my own framework which would allow an easy method of connecting / wiring the columns and the method checks together. I was planning on using DataGrids, but can change that if I need to. Tag: Databinding and Validation with UserControls Tag: 86075
  - 6
    - Inherited controls in worng location Please can you explain the following... I create a new form and add to it the following objects: a MainMenu, A MenuItem, a PictureBox and a Button. I change the button properties so that it is anchored BottomRight. I then create another form which inherits from the first. And I add to it another Button object. I then build my project. After the project has been built the first Button object's location moves up by one pixel! With some experimentation I've found this happens with other objects too but equally, in some circumstanmces, if doesn't happen at all. Can you explain why and whether there is a solution? Tag: Databinding and Validation with UserControls Tag: 86074
  - 7
    - Urgent Help : Re-select Combobox Value Dear all, I'm doing a winform project which uses "ComboBox" in one of the form. The winform contains "ComboBox" with the values as below: - this.ComboBox1.Items.AddRange(new object[] {"Apple", "Orange", "StrawBerry"}); Users will select on of the item from the combobox and stored into database. Users have the rights to update this record. The question is, how do I select the combobox value base on the value from database? I have used "SelectedText", "SelectedValue", but it doesn't seem to be working. Please Help. Thanks in advance. Cheers, Mae Tag: Databinding and Validation with UserControls Tag: 86068
  - 8
    - Form question (Re-usuable code) Is there any way of making the following code into a function so that I don't have to re-use the same code for all my buttons? I've tried to do this with the code at the bottom of my post but I get a build error saying 'Type FormToShow is not defined'. Cheers, Paul Private WithEvents Example1Form As frmDragDropFromExplorer Private WithEvents Example2Form As frmDragDrop Public Shared Sub Main() Application.EnableVisualStyles() Application.DoEvents() Application.Run(New frmMain) End Sub Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click Try Example1Form.Show() Catch Example1Form = New frmDragDropFromExplorer Example1Form.Show() Finally Example1Form.Focus() End Try End Sub ---- Tried this but got the error 'FormToShow is not defined' --- Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click ShowForm(Example1Form) End Sub Private Function ShowForm(ByVal FormToShow As Form) Try FormToShow.Show() Catch FormToShow = New FormToShow FormToShow.Show() Finally FormToShow.Focus() End Try End Function Tag: Databinding and Validation with UserControls Tag: 86062
  - 9
    - Form question (Re-usuable code) Is there any way of making the following code into a function so that I don't have to re-use the same code for all my buttons? I've tried to do this with the code at the bottom of my post but I get a build error saying 'Type FormToShow is not defined'. Cheers, Paul Private WithEvents Example1Form As frmDragDropFromExplorer Private WithEvents Example2Form As frmDragDrop Public Shared Sub Main() Application.EnableVisualStyles() Application.DoEvents() Application.Run(New frmMain) End Sub Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click Try Example1Form.Show() Catch Example1Form = New frmDragDropFromExplorer Example1Form.Show() Finally Example1Form.Focus() End Try End Sub ---- Tried this but got the error 'FormToShow is not defined' --- Private Sub btnExample1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExample1.Click ShowForm(Example1Form) End Sub Private Function ShowForm(ByVal FormToShow As Form) Try FormToShow.Show() Catch FormToShow = New FormToShow FormToShow.Show() Finally FormToShow.Focus() End Try End Function Tag: Databinding and Validation with UserControls Tag: 86061
  - 10
    - Windows Forms .NET 2.0 Advice Hello, I could use some advice. I have an application to build for a client the must be developed as a windows form application. This is an application that was written years ago using VB6 and an access database. I am an experienced .Net developer, version 1.1 but have built web applications, not windows forms. Should I consider .NET 2.0 for this application? I do not have windows form experience in .net so there will be a learning curve either way. Are there enough new features in .net 2.0 windows forms to consider this? Also, can you point me to any good docs on the subject. Thanks scott Tag: Databinding and Validation with UserControls Tag: 86060
  - 11
    - Windows Form and Windows Form User Control - Where Is The Method That Would corresspond To A Web Form Pre_Render Method Hello MyMainWebPage.aspx contains MyUserControl.ascx MyUserControl.ascx has a DataTable Property MyDataTable MyUserControl.ascx has a DataGrid which whose datasource is MyDataTable (or technically it's private accessor but that I don't think is an issue here) MyMainWebPage creates a DataTable dt . I then do a "MyUserControl.MyDataTable = dt" In order for the data to appear in the user control grid I must do the "MyUserControl.MyDataTable = dt" in the Pre_Render of MyWebPage I want to do this type of thing with a window form and windows user control. Where in the windows form user control would I bind the datatable? If I do it in the user controls page_load it does show the data in the datagrid? Thank you, Richard Tag: Databinding and Validation with UserControls Tag: 86051
  - 12
    - datagrid colum's nulltext property displayed in column when field not null I have a record displayed in datagrid and 2 columns says the text i've designated as the nulltext for those columns, but when i look at the data in the db, those values are listed there. is there some issue/bug that can be causing this? thanks Tag: Databinding and Validation with UserControls Tag: 86047
  - 13
    - Re: Using a string array as a datasource in a listbox "claire clinton" claire.clinton@cae.com wrote: > How do I add a string array as a llstbox datasource in the=20 > designer? I have a static class that defines an array and=20 > don't want to rebuild it in the designer. But I have to=20 > manually add the setting of the listbox datasource in code=20 > since the designer seems to only allow adding datasets as=20 > a datasource. This would be ok except when I go back to=20 > the designer, it converts the datasource assignment of the=20 > class array to an equivalent hard coded new string array=20 > and then adds an Item.AddRange assignment for the same=20 > string which then aborts when I run with the error=20 > message "Can't modify the Items collection when the=20 > DataSource property is set". I fix this by deleting the=20 > designer added code and putting my Datasource assignment=20 > back in. This is extremely annoying and will be=20 > unnacceptable for my final product. How can I prevent this=20 > from occuring. I am having a similar problem. Can anyone suggest how to solve it? Thanks, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Databinding and Validation with UserControls Tag: 86045
  - 14
    - How can I turn off the ControlBox but still have Close in the upper right of a form? I know I've done this in the past but can't remember how I did it. How can I turn off the ControlBox but still have the Close X in the upper right of a Form? It's some combo of FixedDialog and ControlBox = false thanks mike Tag: Databinding and Validation with UserControls Tag: 86044
  - 15
    - Problem binding a listbox to an array Hello people, I am having problems binding a listbox to an array. Using Visual Studio 2003 with framework 1.1 That's the array: internal class Data { private Data() {} // static class public static readonly string[] states =3D { "Alabama", = "Alaska", "Arizona", /* ...*/ "Wisconsin", "Wyoming"}; } I also have a listbox on a form. The auto-generated code is: // listStates this.listStates.Name =3D "listStates"; this.listStates.TabIndex =3D 0; this.listStates.Location =3D new System.Drawing.Point(8, 16); this.listStates.Size =3D new System.Drawing.Size(100, 82); this.listStates.SelectionMode =3D = System.Windows.Forms.SelectionMode.MultiSimple; Question number 1: In the designer, the DataSource property of the listStates ListBox is = not editable. I would like to bind it to the array at design time but I cannot. I that supposed to be like that or am I missing something? Question number 2: When I added the following statement listStates.DataSource =3D Data.states; it appeared to work but I started having weird behaviour regarding the = selection. In particular, after selecting several items and unselecting all of = them, the first item would become selected. What am I doing wrong? Thank you, Alex. --=20 Please replace myrealbox with alexoren to reply by email. Tag: Databinding and Validation with UserControls Tag: 86043
  - 16
    - Change mouse cursor when points to specific cell I am creating a linklabel look-a-link in a datagrid with the following code by overriding the paint sub: If column = 0 Or column = 3 Or column = 4 Then Dim UnderlineFont As New Font(Me.DataGridTableStyle.DataGrid.Font, FontStyle.Underline) Dim rect As Rectangle = bounds Dim value As Object = GetColumnValueAtRow(source, rowNum) g.FillRectangle(backBrush, rect) g.DrawString(value.ToString, UnderlineFont, Brushes.Blue, RectangleF.FromLTRB(rect.X, rect.Y, rect.Right, rect.Bottom)) Else MyBase.Paint(g, bounds, source, rowNum, backBrush, foreBrush, alignToRight) End If I only create the linklabel look-alike in specific rows and columns. Now I have to have the cursor change to a 'hand' when the mouse moves over a cell. Note! I am creating the datagrid programmatically so I do not know what rows will contain a link (so I can not use the example by George Shepard in sycfusion). Also, there is NOT a mouseup or mousedown event to work with. I only want the cursor to change to a hand on a specific cell, not a whole row. I have been trying to do with with the datagrid.hittestinfo but can't seem the to get it. Thanks! -- Suz Tag: Databinding and Validation with UserControls Tag: 86041
  - 17
    - Delegate by Book Does anyone know about a good book that teaches Delegates or other types type threading? Tag: Databinding and Validation with UserControls Tag: 86038
  - 18
    - Switching between MDI child windows... I have an MDI application that is causing slight problems when I try to programmatically switch between child forms. When I press CTRL+TAB, the forms switch without much of a flicker at all. But when I try to fire an MDI switch from a toolbar button, I get a pretty noticeable flicker. The way I am changing forms is through the use of the Activate() method on the child form. For instance, nextChild.Activate(); I've tried using the ActivateMdiChild method, i.e., this.ActivateMdiChild(nextChild); but it doesn't seem to do anything. Is there something that I'm missing? I really just want to know how the framework Form class handles a CTRL+TAB key press so I can do the same thing. Thanks, Rich Tag: Databinding and Validation with UserControls Tag: 86037
  - 19
    - Smarthclient and crystal rpt viewer Morning all, How is this viewer suppose to be deployed in a Smartclient app. I keeping having my app looking for Keycodev2.dll. I have added this to my project and copied the dll to the folder on the webserver where my exe is. what do I have to do to get this to work. -- Deasun Home Site: www.tirnaog.com Check out: The Code Vault in my forums section. Tag: Databinding and Validation with UserControls Tag: 86036
  - 20
    - OnSetComplete, OnSet methods do not fire I have a datagrid bound to a strongly typed collection implementing iBindingList. When an item is added to the datagrid, OnInsertComplete fires just fine as I would expect it to. However, the OnSet and OnSetComplete methods don't seem to be firing at all. What I really want to do is: When a row is added to the list (NOT the first row), default one of the columns from the row above it. So when row2 gets added, it should automatically have the value from row1's column X. Any thoughts/suggestions? Tag: Databinding and Validation with UserControls Tag: 86035
  - 21
    - Capturing web page into a bitmap via WM_PRINT Hi, I'm copying the image of a web page into a bitmap by loading the page first into the web browser control (AxSHDocVw.AxWebBrowser) and then sending the WM_PRINT message to the control. Everything works fine except for pages that have Flash animations on them. In those cases the bitmap comes out as blank white. My code is similar to the code in this blog: http://kentb.blogspot.com/2005/03/nice-form.html . I don't think there's anything fundamentally wrong with the code as it works fine for web pages that have no Flash animations. I wonder if anyone has encountered similar problems? I'd be also happy if I could somehow disable the Flash animations via MSHTML if that fixed the problem. Regards, Sami Tag: Databinding and Validation with UserControls Tag: 86033
  - 22
    - Problems with custom events Browsing through some online tutorials, I've been tryingto add a custom event to an app I'm developing but I'm having a little problem. Simplifying the code down to the following (a form with a button that fires the event): namespace CustomEvent { public delegate void MyEventHandler(object sender, MyEventArgs e); /// <summary> /// Summary description for Form1. /// </summary> public class Form1 : System.Windows.Forms.Form { public event MyEventHandler MyEvent; protected virtual void OnMyEvent(MyEventArgs e) { MyEvent(this, e); } << snip template form code >> private void button1_Click(object sender, System.EventArgs e) { OnMyEvent(new MyEventArgs("Fred")); } } public class MyEventArgs: EventArgs { private string name; public MyEventArgs(string name) { this.name = name; } public string Name { get {return name;} } } } The problem I'm having is that the MyEvent(this, e); call fails in OnMyEvent(...) with the following error: "An unhandled exception of type 'System.NullReferenceException' occurred in CustomEvent.exe Additional information: Object reference not set to an instance of an object." Can anyone explain what I'm doing wrong? Cheers in advance Ant Tag: Databinding and Validation with UserControls Tag: 86032
  - 23
    - Capturing change to TextBox I want to simply capture changes to a TextBox and perform some processing when the user has edited the text. The TextChanged event fires even while the user is editing the text, but I only want to perform my validation when the user finished editing the text and moves off the field (tab, enter, mouse-click somewhere else, etc). The Validated event fires when the user moves off the field but fires even if the user does not change the text! I know I could save the "before value" of the text in a local variable in the Enter trigger and compare this to the current value in the Leave or Validate trigger but this is messy! There must be a simpler way surely. Someone please help! Tag: Databinding and Validation with UserControls Tag: 86026
  - 24
    - LIKE A TRANSACTION Hi, I've developped a windows application: I've added some code in order to lauch a merge replication in SQL. My question is: when this code is executing, is it possible to lock the application?? namely nobody can do anything until the code is ended! Thanks for your help :) Tag: Databinding and Validation with UserControls Tag: 86022
  - 25
    - Compiler error for MessageBox::Show I am getting a very strange compiler error for the following code: catch (OpenGLPanelException *openGLError) { //std::string * errorMessage = new std::string(openGLError->errorString); System::Windows::Forms::MessageBox::Show( "junk" ); //, "OpenGL Error", MessageBoxButtons::OK, //MessageBoxIcon::Exclamation ); exit(1); } The error message is: Compiling... Form1.cpp d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2039: 'MessageBoxA' : is not a member of 'System::Windows::Forms' d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(75) : error C2660: 'System::Windows::Forms::Control::Show' : function does not take 1 arguments d:\MSDev\Shared Projects\OpenGLPanel\Test1\Form1.h(246) : warning C4244: 'argument' : conversion from 'double' to 'GLfloat', possible loss of data Build log was saved at "file://d:\MSDev\Shared Projects\OpenGLPanel\Test1\Debug\BuildLog.htm" Test1 - 2 error(s), 1 warning(s) It appears to want to replace the text as if a #define is taking precedence somewhere. The include information is: #include <windows.h> #include <GL\gl.h> #include <iostream> namespace Test1 { using namespace System; using namespace System::ComponentModel; using namespace System::Collections; using namespace System::Windows::Forms; using namespace System::Data; using namespace System::Drawing; using namespace OhioState; If I do not fully scope it, the tooltip seems to indicate MessageBox is the MFC instance. Any help or suggestions? Roger Tag: Databinding and Validation with UserControls Tag: 86012

Hi folks,

I've got a Form with several Controls. One of it is a UserControl.
Then I have put some DataBinding to the Controls with
control.DataBindings.Add(...);
Know there is some strange Behaviour:
Fist: When I change to the UserControl (by clicking in the control), it
doesn't cause validation on the other control. Only if I change to another
Control the validation is occurs. The UserControl has a Property
CausesValidation wich in the Designer is set to true.
Second: I've got some problem to put the Changed value back to the
DataSource. How can I get sure that the changed value of the DataBound
Property is put back to the Control?

Thanks

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Re: Databinding and Validation with UserControls by Christof

Christof
Tue Apr 05 06:36:19 CDT 2005

The problem seames to arise when i'm using a Webbrowser-Control inside the
UserControl to build a HtmlEditor (much like in
http://windowsforms.net/articles/htmleditor.aspx)
I tried to rebuild the problem with a simplier control. The problem is there
when ther is a document in the control.

"Christof Nordiek" <cn@nospam.de> schrieb im Newsbeitrag
news:u0XmoFQOFHA.204@TK2MSFTNGP15.phx.gbl...
> Hi folks,
>
> I've got a Form with several Controls. One of it is a UserControl.
> Then I have put some DataBinding to the Controls with
> control.DataBindings.Add(...);
> Know there is some strange Behaviour:
> Fist: When I change to the UserControl (by clicking in the control), it
> doesn't cause validation on the other control. Only if I change to another
> Control the validation is occurs. The UserControl has a Property
> CausesValidation wich in the Designer is set to true.
> Second: I've got some problem to put the Changed value back to the
> DataSource. How can I get sure that the changed value of the DataBound
> Property is put back to the Control?
>
> Thanks
>

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